What flowers go well with ivory mini calla lilles?

My future sister-in-law is having a wedding and she made me matron of honor. Since, as we all know, money's tight everywhere I'm planning it with her help. She likes ivory mini calla lilies and wants them for her wedding but i cant think of what flowers would look good with them. Her colors are champagne, pink, and red. Any suggestions or helpful tips that would assist in my floral selections and other wedding aspects?|||Roses